10 Best Thru Wall Ac Units 2025 in the United States

The Keystone 14,000 BTU Wall Mounted Air Conditioner is a solid choice for cooling large spaces up to 700 sq. ft. It's versatile, offering not just cooling but also supplemental heating, a dehumidifier function, and fan circulation, making it suitable for year-round use. The 14,000 BTU cooling capacity is powerful, and the 10,600 BTU heating capacity is useful during cooler months, though it's meant as a supplementary heat source, not a primary one. The unit operates best when outside temperatures range between 23 and 76 degrees for heating functions.

It includes a smart remote control that provides convenient temperature monitoring and adjustment, enhancing user comfort. Additionally, modes like 'Energy Saver' and 'Sleep' help reduce electricity consumption, easing your energy bills. However, its Seasonal Energy Efficiency Ratio (SEER) of 9.3 indicates it’s not the most energy-efficient option on the market, and it doesn’t have Energy Star certification. The noise level at 61.5 dB is moderate; not extremely quiet but not excessively loud either.

Installation requires a special 230-volt/20-amp electrical outlet, which might be a consideration if your home isn’t already equipped with one. The unit’s design is space-saving, keeping your windows free, and it comes with a trim kit for easy installation. With a 1-year warranty on parts and labor and an additional 4 years for the sealed system, the product offers a decent assurance of durability. If you need a powerful, multifunctional thru-wall unit and can accommodate its installation requirements, this Keystone model is worth considering.

The LG 10,000 BTU Through the Wall Air Conditioner is designed to effectively cool spaces up to 440 square feet, making it a solid choice for bedrooms, living rooms, or small apartments. With an energy efficiency ratio (EER) of 10.7, it utilizes the efficient R-32 refrigerant, which helps keep energy costs manageable while delivering a reliable cooling performance. The unit offers three cooling speeds and additional modes, including Energy Saver and Dry mode, which are beneficial features for maintaining comfort in varying conditions.

Installation is straightforward for those opting for a through-the-wall setup, though it’s important to note that this unit cannot be installed in a standard window frame. The included trim kit and protective mesh grille help ensure a tidy finish and protection for the unit. Additionally, the washable filter is a practical feature that contributes to extended use.

There are some drawbacks to consider. The noise level is rated at 60 dB, which could be noticeable, especially during quiet hours in residential areas. While it has a solid cooling capacity, it doesn’t come with an Energy Star rating, which may be a concern for some consumers focused on efficiency ratings. Furthermore, at 77 pounds, it may require more than one person for installation, particularly for those not accustomed to handling heavier appliances. This air conditioner is well-suited for users needing an efficient, effective cooling solution for medium-sized rooms, provided they are comfortable with the installation process and can manage the noise level.

The COSTWAY 12000BTU Mini Split Air Conditioner & Heater is a versatile unit designed for both cooling and heating spaces up to 750 square feet. With a high Seasonal Energy Efficiency Ratio (SEER) of 20.0, it promises excellent energy efficiency, which can lead to lower utility bills. The unit operates relatively quietly at 51 dB, which is generally considered acceptable for residential use, ensuring it won't disrupt your peace and quiet significantly.

The included remote control and multiple modes (auto, cool, dry, heat, and fan) provide flexibility and convenience for year-round comfort. The self-cleaning feature at high temperatures and auto-defrost function contribute to maintaining air quality and system longevity. However, installation must be done by a licensed HVAC installer, which could add to the initial cost and complexity. Additionally, the product uses R32 refrigerant, which is more environmentally friendly but might require specific inquiries about its availability for future maintenance.

With a robust warranty covering parts for 5 years and the compressor for 8 years, this unit offers long-term reliability. Potential buyers should consider the installation requirements and ensure compatibility with their existing setup. This unit is ideal for those looking for an energy-efficient, multi-functional air conditioning solution for medium-sized rooms.